SPLK-1002 Data Models and Best Practices — Timed 10 Questions

Question 1

A security analyst needs to create a data model for authentication logs that allows both event counts and average duration calculations. The data model should support fast search performance. Which approach best follows Splunk best practices for data model design?

Accepted Answer

Define root events as event types and add child transactions for duration calculations.. Option A is correct because Splunk best practices for data model design recommend using root events as event types for base calculations like counts, and adding child transactions (or child datasets) for calculations that require grouping multiple events, such as average duration. This separation optimizes search performance by allowing the data model to leverage the faster event-based search for counts while using transactions only when necessary for duration calculations.

Answer

Define the root event as an event type with calculated fields for duration.

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Define the root event as a transaction type to include duration inherently.

Answer

Create separate data models for counts and durations.

Question 2

A Splunk administrator notices that a data model acceleration summary is not updating as expected. The data model is accelerated with a summary range of 30 days. What is the most likely cause of this issue?

Accepted Answer

The summary index is not writable due to insufficient disk space.. Option B is correct because data model acceleration relies on a summary index to store pre-computed results. If the disk hosting that summary index is full, the acceleration process cannot write new data, causing the summary to stop updating. Splunk will log errors related to disk space, and the acceleration status will show as stalled or incomplete.

Answer

The data model is based on a time range older than the summary range.

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The data model includes calculated fields that are not search-time extractable.

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The data model acceleration is configured to run only on real-time searches.

Question 3

A large enterprise has multiple Splunk indexers and is using data model acceleration to speed up dashboards. The dashboards are slow despite acceleration being enabled. The data model has many root events and child datasets. Which best practice should the administrator consider to improve performance?

Accepted Answer

Reduce the number of root events in the data model.. Data model acceleration creates a summary of the data, but the acceleration process must traverse all root events to build the child datasets. If there are too many root events, the acceleration job itself becomes slow and resource-intensive, negating the performance benefit. Reducing the number of root events directly reduces the workload for acceleration, allowing the summaries to be built faster and queries to run against the accelerated data more efficiently.

Answer

Use tstats commands on the data model without acceleration.

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Replicate the data model on each indexer to distribute load.

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Increase the summary range to cover more data.

Question 4

An analyst wants to create a data model that includes fields from both web server logs and database logs. The two sourcetypes have different timestamp formats. Which best practice should the analyst follow when designing the data model?

Accepted Answer

Normalize the timestamp fields using eval expressions in the data model definition.. Option B is correct because the best practice for handling different timestamp formats in a data model is to normalize them using eval expressions within the data model definition. This ensures that all events share a common, consistent timestamp field, which is essential for accurate time-based searches and pivot operations across multiple sourcetypes.

Answer

Use the data model to define new timestamp fields based on indexed data.

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Use the same timestamp field name but ignore the format differences.

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Create two separate data models, one for each sourcetype.

Question 5

A user reports that a data model acceleration is consuming excessive disk space on the indexer. The data model has a summary range of 90 days. Which action is best to reduce disk space usage while maintaining acceptable query performance?

Accepted Answer

Reduce the summary range to 30 days.. Reducing the summary range from 90 days to 30 days directly decreases the amount of data that the acceleration precomputes and stores on the indexer. This minimizes disk space consumption while still accelerating queries for the most recent, commonly accessed data. Maintaining a shorter summary range ensures acceptable performance for recent queries without the overhead of storing summaries for older, less frequently accessed time periods.

Answer

Increase the acceleration frequency to rebuild summaries more often.

Answer

Disable acceleration for the data model.

Answer

Delete old indexed data that is not frequently queried.

Question 6

During a data model acceleration build, the following error appears in splunkd.log: 'Data model acceleration: not enough memory to complete summary build.' Which best practice should the administrator implement to prevent this error?

Accepted Answer

Increase the memory allocation for the data model acceleration process.. Option B is correct because the error 'not enough memory to complete summary build' indicates that the data model acceleration process has exhausted its allocated memory. Increasing the memory allocation for the data model acceleration process (via the limits.conf or the data model acceleration settings) directly addresses this resource constraint, allowing the summary to build successfully.

Answer

Remove unnecessary fields from the data model to reduce complexity.

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Reduce the summary range to less than 7 days.

Answer

Use tstats instead of data model acceleration for queries.

Question 7

A Splunk administrator is designing a data model for network traffic logs. The logs contain source IP, destination IP, bytes transferred, and protocol. The administrator wants to create a root event that counts connections and a child transaction that sums bytes per session. Which constraint type should be used for the root event?

Accepted Answer

Event constraint. The root event in a data model must use an Event constraint because it defines the base dataset from which all child objects inherit their data. Event constraints filter raw events based on search criteria, ensuring the root event contains only the relevant network traffic logs (source IP, destination IP, bytes, protocol) needed to count connections. Child constraints, search constraints, and transaction constraints are not valid constraint types for defining the root event in a Splunk data model.

Answer

Child constraint

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Search constraint

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Transaction constraint

Question 8

Which TWO are best practices for creating data models in Splunk? (Choose two.)

Accepted Answer

Use data model acceleration to improve query performance on large datasets.. Option A is correct because data model acceleration pre-computes and stores aggregated data in the form of summaries (TSIDX files), which dramatically reduces query latency on large datasets by avoiding full scan of raw events. This is a best practice for optimizing performance when using data models in Splunk.

Answer

Base data models on indexed fields rather than search-time extracted fields.

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Create many-to-many relationships between root events and child datasets.

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Include all available fields to ensure maximum flexibility.

Question 9

Which THREE are valid considerations when troubleshooting data model acceleration? (Choose three.)

Accepted Answer

The summary index must be writable and have enough disk space.. Option A is correct because data model acceleration creates a summary index that stores pre-computed results. If the summary index is not writable or lacks sufficient disk space, the acceleration process will fail, preventing the data model from being accelerated.

Answer

Too many fields in the data model can cause acceleration to fail.

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The data model must be based on a real-time search to be accelerated.

Question 10

Which TWO are benefits of using data model acceleration? (Choose two.)

Accepted Answer

Reduced time to run complex aggregations and statistical searches.. Option A is correct because data model acceleration pre-computes and stores aggregated data in the form of summaries (`.tsidx` files), which drastically reduces the time needed to run complex statistical and aggregation searches like `stats`, `timechart`, or `top`. Instead of scanning raw events, Splunk queries these pre-built summaries, enabling sub-second response times for large datasets.

Answer

Reduced disk space usage by compressing indexed data.

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Eliminates the need for data indexing by using summary data.

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Simplified data model design by automatically optimizing relationships.